Alert archive / New Jersey / Flash Flood Warnings in 2021
Flash Flood Warning 70, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Sep 1, 2021, 5:26 PM EDT for 4 counties in New Jersey; 4 counties in Pennsylvania; New Castle County, Delaware. It was in force for 9 hr. 24 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Sep 1, 2021, 5:26 PM EDT (21:26 UTC)
- Expired
- Sep 2, 2021, 2:23 AM EDT
- In force
- 9 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties New Castle County, DE, Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Salem County, NJ, Bucks County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 84 km from the middle of the area, began a volume at 21:29 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 1, 6:00 PM EDT | FLASH FLOOD | 1 S Penn Wynne, PA | THE GAUGE ON COBBS CREEK IN PHILADELPHIA (COBP1) REACHED FLOOD STAGE AT 600 PM 9/1, CRESTING AT 8.24 FEET (MODERATE FLOODING) AT 615 PM 9/1. |
| Sep 1, 6:20 PM EDT | FLASH FLOOD | 1 Ssw Summerdale, PA | THE GAUGE ON FRANKFORD CREEK AT PHILADELPHIA (FCRP1) REACHED FLOOD STAGE AT 620 PM 9/1, CRESTING AT 11.03 FEET (MAJOR FLOODING) AT 640 PM 9/1. |
| Sep 1, 6:41 PM EDT | FLASH FLOOD | 1 W Manayunk, PA | FLOODING FORCED CLOSURE OR LANE RESTRICTIONS OF SEVERAL PORTIONS OF INTERSTATE 76 BETWEEN U.S. HIGHWAY 1 AND THE INTERSTATE 476 INTERCHANGE. |
| Sep 1, 6:43 PM EDT | FLOOD | 1 Nnw Trainer, PA | FLOODING FORCED LANE CLOSURES ON INTERSTATE 95 NEAR THE U.S. HIGHWAY 322 INTERCHANGE. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 6:45 PM EDT | FLASH FLOOD | 1 Sse Manayunk, PA | THE GAUGE ON WISSAHICKON CREEK AT WISSAHICKON (PHAP1) REACHED FLOOD STAGE AT 645 PM 9/1, CRESTING AT 11.06 FEET (MAJOR FLOODING) AT 215 AM 9/2. |
| Sep 1, 7:00 PM EDT | FLASH FLOOD | 1 Ne Willow Grove, PA | DAVISVILLLE AND TERWOOD ROADS FLOODED AT PENNYPACK CREEK. |
| Sep 1, 7:00 PM EDT | FLASH FLOOD | 1 Nnw Flourtown, PA | THE GAUGE ON WISSAHICKON CREEK AT FORT WASHINGTON (FTWP1) REACHED FLOOD STAGE AT 700 PM 9/1, CRESTING AT 17.78 FEET (MAJOR FLOODING) AT 1115 PM 9/1. |
| Sep 1, 7:34 PM EDT | FLASH FLOOD | 1 Ssw Eddington, PA | FLOODING CLOSED STATION ROAD NEAR INTERSTATE 95. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 7:42 PM EDT | FLASH FLOOD | 1 Nw Bensalem, PA | FLOODING CLOSED GALLOWAY ROAD NEAR I-276. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 7:45 PM EDT | FLASH FLOOD | Green Ridge, PA | THE GAUGE ON CHESTER CREEK NEAR CHESTER (CHSP1) REACHED FLOOD STAGE AT 745 PM 9/1, CRESTING AT 10.46 FEET (MODERATE FLOODING) AT 130 AM 9/2. |
| Sep 1, 8:15 PM EDT | FLASH FLOOD | 1 W Media, PA | THE GAUGE ON RIDLEY CREEK AT MEDIA (RIDP1) REACHED FLOOD STAGE AT 815 PM 9/1, CRESTING AT 11.61 FEET (MAJOR FLOODING) AT 1245 AM 9/2. |
| Sep 1, 8:32 PM EDT | FLASH FLOOD | 1 S Pennsauken, NJ | FLOODING ON U.S. HIGHWAY 130 NEAR BROWNING ROAD. ALL LANES CLOSED. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 9:00 PM EDT | FLASH FLOOD | Mantua, PA | THE GAUGE ON THE SCHUYLKILL RIVER AT PHILADELPHIA (PADP1) REACHED FLOOD STAGE AT 900 PM 9/1, CRESTING AT 16.35 FEET (MAJOR FLOODING) AT 930 AM 9/2. |
| Sep 1, 9:27 PM EDT | FLASH FLOOD | Darby, PA | FLASH FLOODING OF DARBY CREEK FORCED THE CLOSURE OF U.S. HIGHWAY 13. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 9:38 PM EDT | FLASH FLOOD | Green Ridge, PA | FLASH FLOODING OF CHESTER CREEK FORCED THE CLOSURE OF DUTTON MILL ROAD. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 10:12 PM EDT | FLASH FLOOD | 1 E Camden, NJ | FLOODING ON U.S. HIGHWAY 30 NEAR FEDERAL STREET. ALL LANES CLOSED. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 10:19 PM EDT | FLASH FLOOD | 1 Sw Palmyra, NJ | STATE HIGHWAY 73 CLOSED AT CARMEN ROAD FROM FLOODING. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 10:40 PM EDT | FLASH FLOOD | Oreland, PA | FLOODING ON PENNSYLVANIA AVENUE AND MOUNT CARMEL AVENUE FORCED THEIR CLOSURES. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 11:00 PM EDT | FLASH FLOOD | Lower Moreland Twp, PA | FLASH FLOODING OF HUNTINGDON VALLEY CREEK FORCED THE CLOSURE OF SEVERAL ROADS IN ITS PROXIMITY. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 11:01 PM EDT | FLASH FLOOD | 1 E Lower Moreland Twp, PA | PINE ROAD CLOSED FROM FLOODING. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 11:04 PM EDT | FLASH FLOOD | 1 Wsw Flourtown, PA | FLASH FLOODING OF WISSAHICKON CREEK FORCED THE CLOSURE OF STENTON AVENUE. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 11:51 PM EDT | FLASH FLOOD | 1 N Hatboro, PA | BLAIR MILL ROAD CLOSED FROM FLOODING. TIME BASED ON DISPATCH REPORT. |
| Sep 2, 1:30 AM EDT | FLASH FLOOD | 1 Ese Mantua, PA | INTERSTATE 676 CLOSED IN PHILADELPHIA FROM FLASH FLOODING. SCHUYLKILL RIVER FLOODING CLOSED SEVERAL ROADS IN THE AREA. TIME BASED ON GAUGE AND DISPATCH REPORTS. |
| Sep 2, 1:40 AM EDT | FLASH FLOOD | 1 Ese Eddington, PA | RADCLIFFE STREET AND STATE ROAD CLOSED FROM FLOODING. TIME BASED ON DISPATCH REPORT. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 9.4 hours before the alert went out and 199 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 558 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 575 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 122 m²/s²
- 0-3 km storm-relative helicity
- 223 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 2.6
The text
As transmitted.
174
WGUS51 KPHI 012126
FFWPHI
DEC003-NJC005-007-015-033-PAC017-045-091-101-020330-
/O.NEW.KPHI.FF.W.0070.210901T2126Z-210902T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
526 PM EDT Wed Sep 1 2021
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Northern New Castle County in northern Delaware...
Northwestern Burlington County in southern New Jersey...
Northwestern Camden County in southern New Jersey...
Northwestern Gloucester County in southern New Jersey...
Northwestern Salem County in southern New Jersey...
South Central Bucks County in southeastern Pennsylvania...
Delaware County in southeastern Pennsylvania...
Southeastern Montgomery County in southeastern Pennsylvania...
Philadelphia County in southeastern Pennsylvania...
* Until 1130 PM EDT Wednesday.
* At 526 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 0.5 and 1.5 inches of
rain have fallen. The expected rainfall rate is 1 to 2 inches in 1
hour. Additional rainfall amounts of 1 to 3 inches are possible in
the warned area. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets, and underpasses as well as other
drainage and low lying areas.
* Some locations that may experience flash flooding include...
Philadelphia, Camden, Wilmington, Gloucester City, Bensalem,
Chester, Pennsville, Yeadon, Burlington, Riverside, Carneys Point,
and Conshohocken.
This includes the following highways...
Pennsylvania Turnpike between mile markers 333 and 352.
Interstate 95 in Pennsylvania between mile markers 0 and 38.
Interstate 95 in Delaware between mile markers 5 and 23.
Interstate 76 in Pennsylvania between mile markers 331 and 351.
Interstate 295 in New Jersey between mile markers 0 and 16.
Interstate 676 in Pennsylvania between mile markers 0 and 1.
Interstate 676 in New Jersey between mile markers 2 and 4.
Interstate 476 in Pennsylvania between mile markers 0 and 19.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 3963 7561 3961 7574 3997 7543 4025 7518
4008 7486 3990 7513 3964 7553
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR
$$
CMS4 follow-up statements
300
WGUS71 KPHI 012201
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
601 PM EDT Wed Sep 1 2021
DEC003-NJC005-007-015-033-PAC017-045-091-101-020330-
/O.CON.KPHI.FF.W.0070.000000T0000Z-210902T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle DE-Burlington NJ-Camden NJ-Gloucester NJ-Salem NJ-Bucks
PA-Delaware PA-Montgomery PA-Philadelphia PA-
601 PM EDT Wed Sep 1 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1130 PM EDT THIS
EVENING FOR NORTHERN NEW CASTLE, NORTHWESTERN BURLINGTON,
NORTHWESTERN CAMDEN, NORTHWESTERN GLOUCESTER, NORTHWESTERN SALEM,
SOUTH CENTRAL BUCKS, DELAWARE, SOUTHEASTERN MONTGOMERY, AND
PHILADELPHIA COUNTIES...
At 601 PM EDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 1 and 3 inches of rain have
fallen. The expected rainfall rate is 1 to 2 inches in 1 hour.
Additional rainfall amounts of 1 to 3 inches are possible in the
warned area. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Life threatening flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets, and underpasses.
Some locations that may experience flash flooding include...
Philadelphia, Camden, Wilmington, Gloucester City, Bensalem,
Chester, Pennsville, Yeadon, Burlington, Riverside, Carneys Point,
and Conshohocken.
This includes the following highways...
Pennsylvania Turnpike between mile markers 333 and 352.
Interstate 95 in Pennsylvania between mile markers 0 and 38.
Interstate 95 in Delaware between mile markers 5 and 23.
Interstate 76 in Pennsylvania between mile markers 331 and 351.
Interstate 76 in New Jersey near mile marker 3.
Interstate 295 in New Jersey between mile markers 0 and 17.
Interstate 676 in Pennsylvania between mile markers 0 and 1.
Interstate 676 in New Jersey between mile markers 1 and 4.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 3963 7561 3961 7574 3997 7543 4025 7518
4008 7486 3990 7513 3964 7553
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR
$$
CMS604
WGUS71 KPHI 020039
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
839 PM EDT Wed Sep 1 2021
DEC003-NJC005-007-015-033-PAC017-045-091-101-020330-
/O.CON.KPHI.FF.W.0070.000000T0000Z-210902T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle DE-Burlington NJ-Camden NJ-Gloucester NJ-Salem NJ-Bucks
PA-Delaware PA-Montgomery PA-Philadelphia PA-
839 PM EDT Wed Sep 1 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1130 PM EDT THIS
EVENING FOR NORTHERN NEW CASTLE, NORTHWESTERN BURLINGTON,
NORTHWESTERN CAMDEN, NORTHWESTERN GLOUCESTER, NORTHWESTERN SALEM,
SOUTH CENTRAL BUCKS, DELAWARE, SOUTHEASTERN MONTGOMERY, AND
PHILADELPHIA COUNTIES...
At 839 PM EDT, local law enforcement reported flash flooding across
the warned area. Several gauges are in flood across the warned area
with roads closed and water rescues ongoing, especially in
Montgomery and Philadelphia Counties. Between 2 and 5 inches of rain
have fallen. Flash flooding is already occurring.
HAZARD...Life threatening flash flooding caused by heavy rain.
SOURCE...Law enforcement reported.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets, and underpasses.
For Cobbs Creek at Philadelphia:
At 7:30pm the stage was 7.51 feet.
Flood Stage is 7 feet.
For Chester Creek at Chester:
At 8:16pm the stage was 9.52 feet.
Flood Stage is 8 feet.
For Frankford Creek at Frankford:
At 8:21pm the stage was 8.68 feet.
Flood Stage is 7 feet.
For Wissahickon Creek at Fort Washington:
At 8:00pm the stage was 12.62 feet.
Flood Stage is 10 feet.
For Christina River at Newport:
At 7:36pm the stage was 7.65 feet.
Flood Stage is 7.2 feet.
For Schuylkill River at Philadelphia near 30th Street:
At 7:35pm the stage was 5.24 feet.
Flood Stage is 9 feet.
For Wissahickon Creek at Wissahickon:
At 8:00pm the stage was 6.42 feet.
Flood Stage is 5 feet.
For Pennypack Creek at Pennypack:
At 8:25pm the stage was 9.53 feet.
Flood Stage is 7 feet.
For Ridley Creek at Media:
At 7:30pm the stage was 6.53 feet.
Flood Stage is 7 feet.
For Christina River at Wilmington:
At 7:36pm the stage was 7.96 feet.
Flood Stage is 7.4 feet.
This includes the following highways...
Pennsylvania Turnpike between mile markers 333 and 352.
Interstate 95 in Pennsylvania between mile markers 0 and 38.
Interstate 95 in Delaware between mile markers 5 and 23.
Interstate 76 in Pennsylvania between mile markers 331 and 351.
Interstate 76 in New Jersey near mile marker 3.
Interstate 295 in New Jersey between mile markers 0 and 17.
Interstate 676 in Pennsylvania between mile markers 0 and 1.
Interstate 676 in New Jersey between mile markers 1 and 4.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 3963 7561 3961 7574 3997 7543 4025 7518
4008 7486 3990 7513 3964 7553
FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
CMS458
WGUS51 KPHI 020221
FFWPHI
DEC003-NJC005-007-015-033-PAC017-045-091-101-020630-
/O.EXT.KPHI.FF.W.0070.000000T0000Z-210902T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
1021 PM EDT Wed Sep 1 2021
The National Weather Service in Mount Holly has extended the
* Flash Flood Warning for...
Northern New Castle County in northern Delaware...
Northwestern Burlington County in southern New Jersey...
Northwestern Camden County in southern New Jersey...
Northwestern Gloucester County in southern New Jersey...
Northwestern Salem County in southern New Jersey...
South Central Bucks County in southeastern Pennsylvania...
Delaware County in southeastern Pennsylvania...
Southeastern Montgomery County in southeastern Pennsylvania...
Philadelphia County in southeastern Pennsylvania...
* Until 230 AM EDT.
* At 1021 PM EDT, local law enforcement reported flash flooding
across the warned area. Several gauges across the warned area are
in flood and will likely remain so for the next several hours.
Avoid unnecessary travel. Between 2 and 6 inches of rain have
fallen. Flash flooding is already occurring.
HAZARD...Life threatening flash flooding caused by heavy rain.
SOURCE...Law enforcement reported.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets, and underpasses.
* For Cobbs Creek at Philadelphia:
At 9:30pm the stage was 5.36 feet.
Flood Stage is 7 feet.
...
For Chester Creek at Chester:
At 9:46pm the stage was 10.0 feet.
Flood Stage is 8 feet.
...
For Frankford Creek at Frankford:
At 10:10pm the stage was 7.92 feet.
Flood Stage is 7 feet.
...
For Wissahickon Creek at Fort Washington:
At 10:01pm the stage was 17.2 feet.
Flood Stage is 10 feet.
...
For Christina River at Newport:
At 9:36pm the stage was 8.31 feet.
Flood Stage is 7.2 feet.
...
For Schuylkill River at Philadelphia near 30th Street:
At 9:35pm the stage was 9.71 feet.
Flood Stage is 9 feet.
...
For Wissahickon Creek at Wissahickon:
At 10:00pm the stage was 6.77 feet.
Flood Stage is 5 feet.
...
For Pennypack Creek at Pennypack:
At 10:06pm the stage was 10.81 feet.
Flood Stage is 7 feet.
...
For Ridley Creek at Media:
At 9:30pm the stage was 7.55 feet.
Flood Stage is 7 feet.
...
For Brandywine Creek at Wilmington:
At 9:16pm the stage was 15.11 feet.
Flood Stage is 16.5 feet.
...
For Schuylkill River at Philadelphia:
At 9:00pm the stage was 11.18 feet.
Flood Stage is 11 feet.
...
For Red Clay Creek at Stanton:
At 9:15pm the stage was 16.78 feet.
Flood Stage is 17 feet.
This includes the following highways...
Pennsylvania Turnpike between mile markers 333 and 352.
Interstate 95 in Pennsylvania between mile markers 0 and 38.
Interstate 95 in Delaware between mile markers 5 and 23.
Interstate 76 in Pennsylvania between mile markers 331 and 351.
Interstate 76 in New Jersey near mile marker 3.
Interstate 295 in New Jersey between mile markers 0 and 17.
Interstate 676 in Pennsylvania between mile markers 0 and 1.
Interstate 676 in New Jersey between mile markers 1 and 4.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 3963 7561 3961 7574 3997 7543 4025 7518
4008 7486 3990 7513 3964 7553
FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
CMS138
WGUS71 KPHI 020623
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
223 AM EDT Thu Sep 2 2021
DEC003-NJC005-007-015-033-PAC017-045-091-101-020633-
/O.CAN.KPHI.FF.W.0070.000000T0000Z-210902T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
New Castle DE-Burlington NJ-Camden NJ-Gloucester NJ-Salem NJ-Bucks
PA-Delaware PA-Montgomery PA-Philadelphia PA-
223 AM EDT Thu Sep 2 2021
...FLASH FLOOD WARNING FOR NORTHERN NEW CASTLE, NORTHWESTERN
BURLINGTON, NORTHWESTERN CAMDEN, NORTHWESTERN GLOUCESTER,
NORTHWESTERN SALEM, SOUTH CENTRAL BUCKS, DELAWARE, SOUTHEASTERN
MONTGOMERY, AND PHILADELPHIA COUNTIES HAS BEEN REPLACED WITH A FLOOD
WARNING...
Please continue to heed road closures.
LAT...LON 3963 7561 3961 7574 3997 7543 4025 7518
4008 7486 3990 7513 3964 7553
$$
CMSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 1, 3:23 AM EDT | Gale Warning | PHI | 32 hr | |
| Sep 1, 3:23 AM EDT | Small Craft Advisory | PHI | 41 hr | |
| Sep 1, 4:34 AM EDT | Rip Current Statement | PHI | Atlantic, Cape May, Monmouth, Ocean | 39 hr |
| Sep 1, 7:58 AM EDT | Severe Thunderstorm Warning | PHI | Burlington, Ocean | 47 min |
| Sep 1, 8:39 AM EDT | Severe Thunderstorm Warning | PHI | Monmouth, Ocean | 39 min |
| Sep 1, 9:11 AM EDT | Special Marine Warning | PHI | 64 min | |
| Sep 1, 11:24 AM EDT | Areal Flood Advisory | PHI | Sussex, Warren | 3 hr |
| Sep 1, 4:04 PM EDT | Areal Flood Warning | PHI | Warren | 24 hr |
| Sep 1, 4:12 PM EDT | Flash Flood Warning | PHI | Hunterdon, Warren | 7 hr |
| Sep 1, 4:27 PM EDT | River Flood Warning | PHI | Morris, Somerset | 6 days |
| Sep 1, 4:27 PM EDT | River Flood Warning | PHI | Essex, Morris, Passaic | 8 days |
| Sep 1, 4:27 PM EDT | River Flood Warning | PHI | Essex, Morris, Passaic | 6 days |
| Sep 1, 4:27 PM EDT | River Flood Warning | PHI | Essex, Passaic | 21 days |
| Sep 1, 4:33 PM EDT | River Flood Warning | PHI | Morris, Passaic | 46 hr |
| Sep 1, 4:40 PM EDT | River Flood Warning | PHI | Hunterdon, Somerset | 36 hr |
| Sep 1, 4:40 PM EDT | River Flood Warning | PHI | Somerset | 22 hr |
| Sep 1, 4:40 PM EDT | River Flood Warning | PHI | Middlesex, Somerset | 42 hr |
| Sep 1, 4:40 PM EDT | River Flood Warning | PHI | Middlesex, Somerset | 48 hr |
| Sep 1, 4:41 PM EDT | River Flood Warning | PHI | Somerset | 61 hr |
| Sep 1, 5:13 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer | 47 min |
| Sep 1, 5:33 PM EDT | Special Marine Warning | PHI | 27 min | |
| Sep 1, 5:34 PM EDT | Tornado Warning | PHI | Mercer | 26 min |
| Sep 1, 5:35 PM EDT | Tornado Warning | PHI | Cumberland, Salem | 25 min |
| Sep 1, 5:42 PM EDT | Flash Flood Warning | PHI | Hunterdon, Mercer, Morris, Somerset, Warren | 10 hr |
| Sep 1, 5:57 PM EDT | Tornado Warning | PHI | Gloucester, Salem | 33 min |
| Sep 1, 5:57 PM EDT | Tornado Warning | PHI | Hunterdon, Mercer, Somerset | 33 min |
| Sep 1, 6:05 PM EDT | Flash Flood Warning | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset | 10 hr |
| Sep 1, 6:08 PM EDT | Flash Flood Warning | PHI | Hunterdon, Morris, Somerset, Sussex, Warren | 6 hr |
| Sep 1, 6:14 PM EDT | Special Marine Warning | PHI | 61 min | |
| Sep 1, 6:20 PM EDT | Tornado Warning | PHI | Hunterdon, Mercer, Somerset | 40 min |
| Sep 1, 6:22 PM EDT | Tornado Warning | PHI | Burlington, Camden, Gloucester | 23 min |
| Sep 1, 6:42 PM EDT | Tornado Warning | PHI | Burlington, Camden | 33 min |
| Sep 1, 6:59 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Middlesex, Monmouth, Morris, Somerset | 61 min |
| Sep 1, 7:04 PM EDT | Tornado Warning | PHI | Burlington, Mercer | 26 min |
| Sep 1, 7:22 PM EDT | Tornado Warning | PHI | Hunterdon, Mercer | 11 min |
| Sep 1, 7:28 PM EDT | Tornado Warning | PHI | Mercer, Middlesex, Morris, Somerset | 47 min |
| Sep 1, 7:31 PM EDT | Flash Flood Warning | PHI | Hunterdon, Mercer, Somerset | 4 hr |
| Sep 1, 7:44 PM EDT | Special Marine Warning | PHI | 61 min | |
| Sep 1, 6:19 AM EDT | Areal Flood Advisory | PHI | Chester, Delaware | 116 min |
| Sep 1, 6:49 AM EDT | Flash Flood Warning | PHI | Chester, Delaware, Philadelphia | 86 min |
| Sep 1, 12:07 PM EDT | Flash Flood Warning | PHI | Carbon, Monroe | 4 hr |
| Sep 1, 1:29 PM EDT | Flash Flood Warning | PHI | Berks, Lehigh | 6 hr |
| Sep 1, 2:53 PM EDT | Flash Flood Warning | PHI | Berks, Chester, Delaware, Montgomery | 9 hr |
| Sep 1, 3:55 PM EDT | River Flood Warning | PHI | Montgomery | 36 hr |
| Sep 1, 3:55 PM EDT | River Flood Warning | PHI | Chester, Montgomery, Philadelphia | 43 hr |
| Sep 1, 3:55 PM EDT | River Flood Warning | PHI | Montgomery, Philadelphia | 41 hr |
| Sep 1, 3:55 PM EDT | River Flood Warning | PHI | Philadelphia | 39 hr |
| Sep 1, 3:55 PM EDT | River Flood Warning | PHI | Berks | 24 hr |
| Sep 1, 4:02 PM EDT | River Flood Warning | PHI | Monroe | 24 hr |
| Sep 1, 4:10 PM EDT | River Flood Warning | PHI | Monroe | 19 hr |
| Sep 1, 4:12 PM EDT | River Flood Warning | PHI | Lehigh, Northampton | 25 hr |
| Sep 1, 4:12 PM EDT | River Flood Warning | PHI | Lehigh, Northampton | 24 hr |
| Sep 1, 4:12 PM EDT | River Flood Warning | PHI | Carbon | 15 hr |
| Sep 1, 4:13 PM EDT | Tornado Warning | PHI | Chester | 32 min |
| Sep 1, 4:20 PM EDT | River Flood Warning | PHI | Montgomery | 22 hr |
| Sep 1, 4:21 PM EDT | River Flood Warning | PHI | Bucks | 29 hr |
| Sep 1, 4:42 PM EDT | Flash Flood Warning | PHI | Chester, Delaware, Montgomery | 6 hr |
| Sep 1, 5:07 PM EDT | River Flood Warning | PHI | Chester | 17 hr |
| Sep 1, 5:15 PM EDT | Tornado Warning | PHI | Delaware, Montgomery, Philadelphia | 30 min |
| Sep 1, 6:38 PM EDT | River Flood Warning | PHI | Chester, Delaware | 26 hr |
| Sep 1, 7:05 PM EDT | Flash Flood Warning | PHI | Bucks | 8 hr |
| Sep 1, 7:23 PM EDT | Areal Flood Warning | PHI | Berks, Lehigh | 14 hr |
| Sep 1, 7:53 PM EDT | River Flood Warning | PHI | Delaware | 13 hr |
| Sep 1, 8:03 AM EDT | River Flood Warning | PHI | New Castle | 4 hr |
| Sep 1, 4:59 PM EDT | Tornado Warning | PHI | Kent, Sussex | 46 min |
| Sep 1, 5:01 PM EDT | Tornado Warning | PHI | Kent, New Castle | 44 min |
| Sep 1, 5:16 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 44 min |
| Sep 1, 6:03 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 42 min |
| Sep 1, 6:08 PM EDT | River Flood Warning | PHI | New Castle | 18 hr |
| Sep 1, 6:15 PM EDT | River Flood Warning | PHI | New Castle | 9 hr |
| Sep 1, 6:24 PM EDT | Tornado Warning | PHI | New Castle | 16 min |
| Sep 1, 6:38 PM EDT | River Flood Warning | PHI | New Castle | 28 hr |
| Sep 1, 6:57 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Sussex | 63 min |
| Sep 1, 7:44 PM EDT | River Flood Warning | PHI | New Castle | 11 hr |
Nearby
Flash Flood Warnings in New Jersey, 2021Flash Flood Warnings in Pennsylvania, 2021Flash Flood Warnings in Delaware, 2021Every flash flood warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.